CI, confidence interval.
a Weighted for stratification by area, differential population growth between 1999 and 2006 and different cluster size.
b Data on sex were missing for 9 cases.
c Data on age were missing for 18 cases.
d P-value for trend.
e P-value for the difference between this age group compared with all other age groups combined.
f P-value for the difference between this area compared with the other two areas together.
g P-value for the difference between this region compared with the other two regions together.